Thread cutter for weft-replenishing looms



A. J. CHEVRETTE THREAD CUTTER FOR WEFT REPLENISHING LOOMS March 13, 1928.

Filed Aug. 6, 1926 2 Shpets-Sheet 1 March 13, l928. 1,662,235 I A. .J. CHEVRETTE THREAD CUTTER FOR WEFT REPLENISHING LOOMS Filed Aug. e. 1926 2 Sheets-Sheet 2 Patented Mar. 13, 1928.

AUGUSTIN J. CHEVRETTE, OF WORCESTER, & KNOWLES LOOM WORKS, 015 WORCES MASSACHUSETTS.

nassaonusnrrs, AS

TEE, MASSACHUEEETTS, A COBPDRATFON OF THREAD CUTTER F03 WEFT-REPLENISHIHG LOOMS.

Application filed August 6, 1926. Serial 110. 127,695.

This invention relates to improvements in thread cutters for weft replenishing looms and it is the principal object of the invention to provide a cutter positively opened and closed and operating without the use of springs. 1

In weftreple-nishing mechanisms, more particularly of the multicolor type, it 18- customary to employ a magazine which advances the bobbin toward transfer position in two distinct movements, the first occurring at the time of indication of weft exhaustion and the second occurring when the indicating shuttle returns tothe magazine side of the loom. WVhen this second movement takes place a shuttle feeler is moved downwardly so as to be raised by a misplaced shuttle to revoke transfer, the shuttle feeler receiving its movement while the lay is near its backward position. It is a further object of my invention to provide a clamp in connect on with the shuttle feeler and revoker which shall be opened when the latter is lowered.

In this way any filling released by the clamp will fall down in front of the lay and not on the race plate.

It is afurther object of my invention to provide a combined cutter and clamp which shall be open while the lay is in its backward position but which will receive its cutting movement directly from the lay and on the forward movement thereof.

WVith these and other objects in view which will appear as the description proceeds my invention resides in the co bination and ar rangement of parts hereinafter described and set forth in the claims.

In the accompanying drawings wherein I have shown a convenient embodiment of my invention- Fig. 1 is a side elevation of my improved cutter in inactive position as viewed from the central portions of the loom, parts of the lay being in section, I

Fig. 2 is a view similar to Fig. 1 but with the cutter in open position ready to receive the thread of the bobbin about to be expelled from the empty shuttle and releasing the thread remaining from the previous transfer,

Fig. 3 is an enlarged detail side elevation of the cutter corresponding to the position shown in Fig. 1,

Fig. 4 is an enlarged fragmentary side elevation of parts of the cutter and clamp sronon 'ro onomr'ron corresponding to the position shown 1n 1 Fig. 2, V

F1g. 5 1s a vertical section on line of Fig. 3, 1 Fig. 6 1s a rear elevation taken in the direction of arrow 6, Fig. l.

Referring to the drawings it will be seen that I have provided a magazine frame 10 in the upper portion of which is mounted for limited rocking movement a top shaft 11 to the rear end of which is secured an arm 12 pivotally connected to a depending rod 13. A stud .1 1 secured in the bottom of the magazine frame has pivotally mounted thereon a carrier 15 grooved as at 16 to receive the upper rear end of a shuttle feeler orrevoker 17. Said carrier is pivotally connected as at 18 to the lower end of rod 13 and moves about stud 1 1 as a pivot when the shaft 11 is oscillated,

The usual transferrer arm 19 may be pivoted on the stud 20 secured to the frame-and have pivotally connected to the lower. end thereof a latch 21 to be engaged by a dagger 22 on the lay L. Said lay is rovided with box back 23 the upper 'sur 'ace of which is upwardly and rearwardly inclined as at 24. The shuttle S is provided with a bob bin 13 which at the time of transfer is expolled from the shuttle downwardly through slot 25 in the lay L. Thelower forward end of the revoker 17 is formed as indicated in Figs. 1 and 1 andhas a downwardly and forwardly curved surface 26 on the under side thereof positioned to engage a misplaced shuttle or inclined surface 24.

In the operation of the device thus far described the shuttle feeler or revoker 17 will be held in the raised position indicated in Fig. 1 on all excepttransferring beats of the loom, but as the lay starts forward from its rear position on a transferring beat the top shaft 11 will be rocked by mechanism not shown but well understood to depress rod 13 and lowcr the carrier 15 to place the shuttle feeler or revolrer 17 in the path of the advancing shuttle. If the shuttle should be misplaced as the lay advances the inner end of the shuttle will raise the revoker to cause an oscillation of shaft 11 which will result in the depression of a rod 27. This indicated at 28 secured to the rod 11 and the other indicated at 29 as part of a. bell crank lever 30 pivoted on a fixed stud 31. Said rod 2? is connected to another arm of the lever 30 as indicated at in Fig. 1. The elfect of this downward movement of rod 27 is to depress the latch 21 so that the same will be moved below the advancing dagger 22 to prevent transfer. \Vhen the shuttle is properly placed, however, transfer will occur in the ordinary manner. The matter thus far described is of common construction and may be as set forth in prior Patent No. 1,030,718 to Ryon.

In carrying out my improvements ll mount a thread cutter and clamp on the arm 17, the cutter comprising a. fixed plate secured to the rcvokcr by a screw 1 and having a lower cutting edge 12, see Fig. 5. The lower part. of the cutter comprises a blade 43 pivoted on a screw 11 which passes through the cutter plate -10 and the arm 17. Said screw 41 cooperates with screw 11 to hold the plate 10 in lixed position relatively to the revoker. To further insure contact between the cutters I may extend the forward ends of the plate 40 and blade -13 forwardly as indicated at 16 and 17, respectively. The pivoted blade 13 has an upward ly and forwardly projecting arm 45 pivotally connected by means of a screw 48 to a rod -19 which as indicated in Figs. 1 and 2 is extended upwardly and rearwardly to have adjustable pivotal contact with a stud 50 tixed with respect to the frame 10, said adjustment being rendered possible by rod head 51. The blade 13 has a cutting edge which cooperates with the cutting edee The clamp for holding the thread comprises a resilient thread holding member 5-3 which indicated in Fig. (5 has the upper rearward end thereof secured as by screws 5st to the revolzer or shuttle feelcr 1i and has the lower end thereof ollset as at as and shaped to conform to the contour of the rear lower edge of the revoker 17. The bottom of said clamp as indicated at 56 projects slightly below the cutting edge 42 as indicated in Fig. :l. to clamp the thread before it is cut. Said clamp 53 presses against the inner side of the blade 43 and serves by such pressure to keep the cutting members in close contact with each other.

In the operation of the device the parts are normally in the position indicated in Fig. 1 with the revoker 17 in raised position and the cutter 43 located between the clamp and the plate 40. 'When a transfer is about to occur the shuttle feeler or revolrer 17 will be depressed to the position shown in Fig. 2. as previously set forth. Inasmuch as the rear upper end of rod 49 is fixed the downward movement of the revoker will necessarily open the cutter so that the latter will assume the position shown in full lines in Figs. and 4'. As the lay advances the filling tl'lrcad \V will, pass into the rearwardly opening mouth of the cutter defined between the cutting edges as indicated in Fig. and as the lay continues to advance the surface fi l of the box back 21 will engage the under surface it; of the l'('. volcer and raise the latter to the position shown in Figs. 1 and 3. It will be obvious that when this motion taltr-s place the blade 1 will move around the ascending stud or screw =11, tirst to clamp the thread l betwcen said blade 13.) and the clamp .7 and then innnediatcly there-titer to cut the thread. Inasmuch as the shuttle revolter is normally raised to the position shown in Fig. l the weft. end '1 will be held by the clamp. The downward movement of the revolter, as previously described, occurs while the lay is in a rearward position as indicated in Fig. i. and the short end '1. will, therefore, be released by the clamp to fall in front of the lay and not on it, as is the case with many cutters heretofore provided. As described in the aforesaid patent the feeler arm 17 will be held above the lay under ordinary conditions. being movable to this position about the stud it which above and to the rear latter is in transferring position.

From the foregmint it will be icon that I have provided a combined thread cutter and clamp mounted on the shuttle feeler or rt voker of an automatic loom having both the opening and closing moven'ients ell'ected liiositively without: the use of springs. it will further be seen that the stud l-l is located behind the lay when the latter is in its forward position so that the cutter and clamp are capable of an upward movem nt to be out of the path of the lay on tilt 't'titb inc movements thereof.

Having thus described my invention it will be apparent that changes and modifications may be made therein by those skilled in the art without departing from the spirit and scope of the invention. and I do notv wish to be limited to the details herein disclosed but what I claim is:

1. In a thread cutter for a welt replenishing loom having a lay, a shuttle fecler pivoted to the mechanism above and behind the lay when the latter is in its forward position and normally located above the shuttle the lay moves back and forth, a thread cutter mounted on the forward end of the shuttle feeler and having a member pivotally mounted on the shuttle t'eeler. a link connected at; one end to tho pivoted cutter member and having the other end fixed, and means operated by the replenishing mechanism to lower the shuttle fecler, the link opening the cutter as the feeler is lowered and the lay raising the shuttle feeler of the lay when the and the link closing the cutter as the shuttle feeler is raised.

2. In a filling thread cutter for looms, weft replenishing mechanism, a lay movable back and forth relatively to the mechanism, a shuttle feeler pivoted on the mechanismat a point behind and above the lay when the latter is in its extreme forward position, said feeler extending forwardly over the lay to engage a misplaced shuttle, connections from the replenishing-mechanism to the shuttle feeler to lower the latter into the path of the lay on a transferring beat of the loom when the lay is in its rearward position, a cutter mounted on the shuttle feeler, and positive means to open and close the thread cutter as the shuttle feeler is lowered and raised respectively.

3. In the filling thread cutter, weft replenishing mechanism, a lay movable back and forth relatively to the mechanism, a shuttle feeler pivoted to the mechanism above and behind the lay when the latter is in its extreme forward position and normally extending forwardly over the lay, means operatively connected to the shuttle feeler and actuated by the replenishing mechanism to lower said feeler into the path of the advancing lay on transferring beats of the loom when the lay is in rearward pos'i tion, a cutter mounted on the forward end of the shuttle feeler, said cutter having a pivoted member, a link operatively connected at one end to the pivoted cutter member and having the other end thereof fixed relatively to the replenishing mechanism, said link opening the cutter to receive the filling when the shuttle feeler is lowered into the path of the lay and said lay engaging the shuttle feeler to raise the same, whereby the pivoted cutter member will be given a cutting movement because of the fact that one end of the link is relatively fixed.

4. In the filling thread cutter, weft replenishing mechanism, a lay movable back and forth relatively to the mechanism, a shuttle feeler pivoted to the mechanism above and behind the lay when the latter is in its extreme forward position and normally 1 extending forwardly over the lay, means operatively connected to the shuttle feeler and actuated by the replenishing mechanism to lower said feeler into the path of the advancing lay on transferring beats of the loom when the lay is in rearward position, a

cutter blade fixed to the shuttle feeler, a second cutter pivoted to the shuttle feeler and cooperating with the cutter blade, and rigid means operatively connected to the pivoted cutter member and a part fixed relatively to the replenishing mechanism to give said cutter member a positive opening and closing movement relatively to the blade as the shuttle feeler is lowered and raised respecs tively.

5. In theefilling thread cutter, weft res plenishing mechanism, a lay movable back and forth relatively to the mechanism, a

shuttle feeler pivoted to the mechanism above and behind the lay when the latter is in its extreme forward position and normally extending forwardly over the lay,

means operatively connected to the shuttle v feeler and actuated by the replenishing mechanism to lower said feeler into the path of the advancing lay on transferring beats of the loom when the lay is in rearward position, a cutter blade fixed to the shuttle feeler, a cutting element pivoted to the shuttle feeler and cooperating with said blade and having a rearwardly extending cutting edge, an upwardly extending arm movable with the pivoted element, a link 

